I don't believe that it actually happened (for one thing, Paul wasn't actually in England when the accident happened, and there are many other facts that disprove it), but it's interesting to research and read about. I sometimes find the clues and backmasking creepy, though.
I dont think thats true and if it is well they only used a double to.keep spreading their message across that the world should be PEACE AND amor NOT HATE AND VIOLENCE.